A couple months back my CEL came back intermittently. I got tired of pulling the module so I finally replaced it. At Chrysler the module cost approx. $250 to $300. I found the same part, online from M.-Benz at $150 to $175. I got mine from a dealer for $167.00 +tax. The dealer priced it at $220 originally, I told him I found it online at $150, he came down to the $167. I have noticed that my spoiler deploys at 67mph with the other module it went up at 64-65mph. I am wondering what all the module controls and which relay controls what.